Modular structure



FIG. 1 is a top view of the modular structure, showing my new design;

FIG. 2 is a bottom view of the design illustrated in FIG. 1;

FIG. 3 is a left side view of the design illustrated in FIG. 1;

FIG. 4 is a right side view of the design illustrated in FIG. 1;

FIG. 5 is a front view of the design illustrated in FIG. 1; and

FIG. 6 is a rear view of the design illustrated in FIG. 1; and,

FIG. 7 is a top perspective view of the design illustrated in FIG. 1. 

CLAIM The ornamental design for a modular structure, as shown and described. 